At the character selection screen, press Left, Right, Left(2), Right, Up, Down, R1(5), R2 to unlock all boxers, costumes, and more. If you entered the code correctly, you will hear a sound. Press Square to cycle through the costumes.

All boxers

At the character selection screen, press Left(2), Right, R2, Left, Right(2), R1(2), R2. If you entered the code correctly, you will hear a sound. -From: TrowaBartonMSG03@aol.com

All champion costumes

At the character selection screen, press Left, Down, Right(2), Up, R1, R2, R1(20), R2. If you entered the code correctly, you will hear a sound. Alternatively, successfully complete championship mode to unlock the champion costumes.

All holiday costumes

At the character selection screen, press Left(2), Down, Right, Up, R1(8), R2, R1(4), R2. If you entered the code correctly, you will hear a sound.

All training

At the character selection screen, press Left, Down, Up, Down, Up, R1(20), R2. If you entered the code correctly, you will hear a sound.

Set holiday to New Years

At the character selection screen, press Right, Up, Down(3), R1, R2. If you entered the code correctly, you will hear a sound.

Set holiday to Valentines Day

At the character selection screen, press Right, Up, Down(3), R1(2), R2. If you entered the code correctly, you will hear a sound.

Set holiday to St. Patricks Day

At the character selection screen, press Right, Up, Down(3), R1(3), R2. If you entered the code correctly, you will hear a sound.

Set holiday to Easter

At the character selection screen, press Right, Up, Down(3), R1(4), R2. If you entered the code correctly, you will hear a sound.

Set holiday to Independence Day

At the character selection screen, press Right, Up, Down(3), R1(5), R2. If you entered the code correctly, you will hear a sound.

Set holiday to Halloween

At the character selection screen, press Right, Up, Down(3), R1(6), R2. If you entered the code correctly, you will hear a sound.

Set holiday to Thanksgiving

At the character selection screen, press Right, Up, Down(3), R1(7), R2. If you entered the code correctly, you will hear a sound.

Set holiday to Christmas

At the character selection screen, press Right, Up, Down(3), R1(8), R2. If you entered the code correctly, you will hear a sound.

Set holiday to New Years

At the character selection screen, press Right, Up, Down(3), R1, R2. If you entered the code correctly, you will hear a sound.

Fat boxer

At the character selection screen, press Right(2), Up, Down, Right, R1(2), R2. If you entered the code correctly, you will hear a sound.

Thin boxer

At the character selection screen, press Right(2), Up, Down, Right, R1, R2. If you entered the code correctly, you will hear a sound.

Undead boxer

At the character selection screen, press Left, Up, Right, Down, R1(2), R2. If you entered the code correctly, you will hear a sound.

Big head

At the character selection screen, press Right(2), Up, Down, Right, R1(3). If you entered the code correctly, you will hear a sound.

Big gloves

At the character selection screen, press Left, Right, Up, Down, R1, R2. If you entered the code correctly, you will hear a sound.

Faster gameplay

At the character selection screen, press Right(2), Up, Down, Right, R1(4), R2. If you entered the code correctly, you will hear a sound.